分离燃尽风水平摆角对1000MW八角切圆锅炉燃烧特性影响的数值研究  

Numerical Study on the Impact of Horizontal Yaw Angle of Separated Over Fire Air on the Combustion Characteristics in a 1000MW Dual Circle Tangential Fired Boiler

作　　者：王亚欧[1] 耿察民 金炜 陈波 WANG Ya-ou;GENG Cha-min;JIN Wei;CHEN Ho(Jiangsu Frontier Electric Technology Co.Ltd.,Nanjing,China,Post Code:211102;Key Laboratory ol Energy Thermal Conversion and Control of Ministry of Education,Southeast University,Nanjing,China,Post Code:210096)

机构地区：[1]江苏方天电力技术有限公司,江苏南京211102 [2]东南大学能源热转换及其过程测控教育部重点实验室,江苏南京210096

出　　处：《热能动力工程》2021年第8期106-113,共8页Journal of Engineering for Thermal Energy and Power

摘　　要：以某1000 MW八角双切圆锅炉为研究对象,采用数值模拟方法分析了分离燃尽风(SOFA)水平摆角对炉膛出口烟气温度、速度以及炉内主要燃烧产物分布的影响。结果表明:将SOFA水平摆角正向增大5°时可同时降低CO与NOx排放量;正向增大SOFA水平摆角,即SOFA正旋切圆直径增大,炉膛出口两侧逐渐出现双峰型高温烟气区,烟温偏差有所增大,而烟气高流速区则向炉膛出口中部移动;反向增大SOFA水平摆角,即SOFA反旋切圆直径增大,炉膛出口烟气温度和速度分布的不均匀性均有所减小。A 1000 MW dual circle tangentially fired boiler was numerically simulated to reveal the impact of horizontal yaw angle of separated over fire air(SOFA)on flue gas temperature and velocity at the furnace outlet as well as the distribution of primary combustion products.The results show that CO and NOX emissions can be reduced simultaneously as the SOFA horizontal yaw angle positively increases by 5°.When SOFA horizontal yaw angle increases positively,that is SOFA positive tangential circle diameter increases,bimodal high-temperature zone gradually appears on both sides of the furnace outlet,and the flue gas temperature deviation gets worse.Meanwhile,the high-velocity zone is shifted to the middle of furnace outlet.When SOFA horizontal yaw angle reversely increases,that is SOFA inverse tangential circle diameter increases,the temperature and velocity distributions of flue gas are more uniformly distributed at furnace outlet.

关 键 词：SOFA摆角 空气分级燃烧 八角切圆锅炉 数值模拟 

分 类 号：TK221[动力工程及工程热物理—动力机械及工程]